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  <title>得到当前缓冲区的内容并删除当前输出缓冲区</title>
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    <li>得到当前缓冲区的内容并删除当前输出缓冲区</li>
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  <div id="layout-content"><div id="function.ob-get-clean" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ob_get_clean</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">ob_get_clean</span> &mdash; <span class="dc-title">得到当前缓冲区的内容并删除当前输出缓冲区</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.ob-get-clean-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>ob_get_clean</strong></span>(): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   得到当前缓冲区的内容并删除当前输出缓冲区。
  </p>
  <p class="para">
   <span class="function"><strong>ob_get_clean()</strong></span> 实质上是一起执行了
   <span class="function"><a href="function.ob-get-contents.html" class="function">ob_get_contents()</a></span> 和
   <span class="function"><a href="function.ob-end-clean.html" class="function">ob_end_clean()</a></span>。
  </p>
  <p class="para">
   输出缓冲区必须由带有 <a href="outcontrol.constants.html#constant.php-output-handler-cleanable" class="link">PHP_OUTPUT_HANDLER_CLEANABLE</a>
   和 <a href="outcontrol.constants.html#constant.php-output-handler-removable" class="link">PHP_OUTPUT_HANDLER_REMOVABLE</a> flag
   的 <span class="function"><a href="function.ob-start.html" class="function">ob_start()</a></span> 启动。否则 <span class="function"><strong>ob_get_clean()</strong></span> 将不起作用。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.ob-get-clean-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ob-get-clean-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回输出缓冲区的内容，并结束输出缓冲区。如果输出缓冲区不是活跃的，即返回 <strong><code>false</code></strong> 。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.ob-get-clean-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-536">
    <p><strong>示例 #1 <span class="function"><strong>ob_get_clean()</strong></span> 的简单示例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />ob_start</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Hello&nbsp;World"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$out&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ob_get_clean</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$out&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$out</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$out</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>

string(11) &quot;hello world&quot;

</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ob-get-clean-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.ob-get-contents.html" class="function" rel="rdfs-seeAlso">ob_get_contents()</a> - 返回输出缓冲区的内容</span></li>
    <li class="member"><span class="function"><a href="function.ob-start.html" class="function" rel="rdfs-seeAlso">ob_start()</a> - 打开输出控制缓冲</span></li>
   </ul>
  </p>
 </div>
 

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